Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git

[pandora-kernel.git] / fs / cifs / cifsfs.c

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 51548ed..79eeccd 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -32,6 +32,7 @@
 #include <linux/seq_file.h>
 #include <linux/vfs.h>
 #include <linux/mempool.h>
+#include <linux/delay.h>
 #include "cifsfs.h"
 #include "cifspdu.h"
 #define DECLARE_GLOBALS_HERE
@@ -429,6 +430,11 @@ static void cifs_umount_begin(struct super_block * sblock)
        {
                cFYI(1,("wake up tasks now - umount begin not complete"));
                wake_up_all(&tcon->ses->server->request_q);
+               wake_up_all(&tcon->ses->server->response_q);
+               msleep(1); /* yield */
+               /* we have to kick the requests once more */
+               wake_up_all(&tcon->ses->server->response_q);
+               msleep(1);
        }
 /* BB FIXME - finish add checks for tidStatus BB */
 
@@ -507,6 +513,17 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf,
        return written;
 }
 
+static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+{
+       /* origin == SEEK_END => we must revalidate the cached file length */
+       if (origin == 2) {
+               int retval = cifs_revalidate(file->f_dentry);
+               if (retval < 0)
+                       return (loff_t)retval;
+       }
+       return remote_llseek(file, offset, origin);
+}
+
 static struct file_system_type cifs_fs_type = {
        .owner = THIS_MODULE,
        .name = "cifs",
@@ -580,6 +597,7 @@ struct file_operations cifs_file_ops = {
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
        .sendfile = generic_file_sendfile,
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -603,7 +621,7 @@ struct file_operations cifs_file_direct_ops = {
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
@@ -621,6 +639,7 @@ struct file_operations cifs_file_nobrl_ops = {
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
        .sendfile = generic_file_sendfile,
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -643,7 +662,7 @@ struct file_operations cifs_file_direct_nobrl_ops = {
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
@@ -727,7 +746,7 @@ cifs_init_request_bufs(void)
                kmem_cache_destroy(cifs_req_cachep);
                return -ENOMEM;
        }
-       /* 256 (MAX_CIFS_HDR_SIZE bytes is enough for most SMB responses and
+       /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
        almost all handle based requests (but not write response, nor is it
        sufficient for path based requests).  A smaller size would have
        been more efficient (compacting multiple slab items on one 4k page) 
@@ -736,7 +755,8 @@ cifs_init_request_bufs(void)
        efficient to alloc 1 per page off the slab compared to 17K (5page) 
        alloc of large cifs buffers even when page debugging is on */
        cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
-                       MAX_CIFS_HDR_SIZE, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+                       MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, 
+                       NULL, NULL);
        if (cifs_sm_req_cachep == NULL) {
                mempool_destroy(cifs_req_poolp);
                kmem_cache_destroy(cifs_req_cachep);
@@ -854,9 +874,9 @@ static int cifs_oplock_thread(void * dummyarg)
                                DeleteOplockQEntry(oplock_item);
                                /* can not grab inode sem here since it would
                                deadlock when oplock received on delete 
-                               since vfs_unlink holds the i_sem across
+                               since vfs_unlink holds the i_mutex across
                                the call */
-                               /* down(&inode->i_sem);*/
+                               /* mutex_lock(&inode->i_mutex);*/
                                if (S_ISREG(inode->i_mode)) {
                                        rc = filemap_fdatawrite(inode->i_mapping);
                                        if(CIFS_I(inode)->clientCanCacheRead == 0) {
@@ -865,7 +885,7 @@ static int cifs_oplock_thread(void * dummyarg)
                                        }
                                } else
                                        rc = 0;
-                               /* up(&inode->i_sem);*/
+                               /* mutex_unlock(&inode->i_mutex);*/
                                if (rc)
                                        CIFS_I(inode)->write_behind_rc = rc;
                                cFYI(1,("Oplock flush inode %p rc %d",inode,rc));
@@ -895,6 +915,9 @@ static int cifs_oplock_thread(void * dummyarg)
 
 static int cifs_dnotify_thread(void * dummyarg)
 {
+       struct list_head *tmp;
+       struct cifsSesInfo *ses;
+
        daemonize("cifsdnotifyd");
        allow_signal(SIGTERM);
 
@@ -903,7 +926,19 @@ static int cifs_dnotify_thread(void * dummyarg)
                if(try_to_freeze())
                        continue;
                set_current_state(TASK_INTERRUPTIBLE);
-               schedule_timeout(39*HZ);
+               schedule_timeout(15*HZ);
+               read_lock(&GlobalSMBSeslock);
+               /* check if any stuck requests that need
+                  to be woken up and wakeq so the
+                  thread can wake up and error out */
+               list_for_each(tmp, &GlobalSMBSessionList) {
+                       ses = list_entry(tmp, struct cifsSesInfo, 
+                               cifsSessionList);
+                       if(ses && ses->server && 
+                            atomic_read(&ses->server->inFlight))
+                               wake_up_all(&ses->server->response_q);
+               }
+               read_unlock(&GlobalSMBSeslock);
        } while(!signal_pending(current));
        complete_and_exit (&cifs_dnotify_exited, 0);
 }
@@ -933,6 +968,12 @@ init_cifs(void)
        atomic_set(&tconInfoReconnectCount, 0);
 
        atomic_set(&bufAllocCount, 0);
+       atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+       atomic_set(&totBufAllocCount, 0);
+       atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
        atomic_set(&midCount, 0);
        GlobalCurrentXid = 0;
        GlobalTotalActiveXid = 0;